Structural　health　monitoring　(SHM)　is　a　technology　that　can　change　the　maintenance　mode　of　structure　from　passive　to　active.　This　paper　introduces　Lamb　waves　into　the　monitoring　of　cracks　on　bogie　frame,　which　is　beneficial　to　monitor　the　damage　of　blind　areas　in　traditional　inspection　that　are　unable　or　inconvenient　to　detect.　At　the　same　time,　this　method　is　conducive　to　realize　the　life-cycle　management.　In　addition,　the　detection　method　based　on　vibro-acoustic　modulation　theory　is　very　sensitive　to　the　closed　micro　cracks.　Therefore,　it　can　recognize　the　damage　in　initial　stage,　thus　reduce　the　loss.　Experiments　show　that　this　method　can　effectively　identify　the　fatigue　cracks　on　bogie　frame　with　no　need　for　healthy　baseline　data.　©　Springer　Nature　Singapore　Pte　Ltd.　2020.